Swivelable nozzle for a jet engine

Claim 1

A JET ENGINE COMPRISING: A MAIN NOZZLE; A FURTHER NOZZLE COMPRISING A PART-SPHERICAL COVERGENT OUTER MEMBER, A SINGLE PART-SPHERICAL COVERGEN INNER MEMBER SWIVELABLE WITH RESPECT TO THE OUTER MEMBER TO ALTER THE DIRECTION OF JET GASES PASSING THROUGH THE INNER MEMBER WHEN THEY LEAVE THE SAME, SAID INNER MEMBER BEING MOUNTED WITHIN AND SPACED INWARDLY FROM SAID OUTER MEMBER TO DEFINE AN ANNULAR PART-SPHERICAL CONVERGENT GAS PASSAGE THEREBETWEEN, SAID GAS PASSAGE BETWEEN SAID OUTER MEMBER AND SAID INNER MEMBER INSURING THAT JET GASES SUPPLIED TO THE FURTHER NOZZLE AND PASSING THROUGH SAID GAS PASSAGE CONTRIBUTE TO THE THRUST PRODUCED BY THE FURTHER NOZZLE WHEN DISCHRGED FROM THE GAS PASSAGE; AND VALVE MEANS HAVING RESPECTIVE POSITIONS IN WHICH JET GASES FLOW RESPECTIVELY THROUGH SAID MAIN NOZZLE AND THROUGH SAID FURTHER NOZZLE.